Fabric node and channel features that change day-two operations for member organizations: joining peers from ledger snapshots and private data collections with purging.
Bringing new peers or new member organizations onto long-running channels from a snapshot: scheduling snapshots at the same height on several peers, verifying file hashes, transferring snapshots out of band, and the query, private data and admin command limits afterward.
Keeping sensitive data among a subset of organizations on a Fabric channel: collection membership, hashes on the shared ledger as evidence, automatic purging after a set number of blocks, explicit purges, and how this affects peers catching up and backups.
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